Design Strategies and Merit of System Parameters for Uniform Uncompensated Links Supporting Nyquist-WDM Transmission

Curri, Vittorio; Carena, Andrea; Arduino, Andrea; Bosco, Gabriella; Poggiolini, Pierluigi; Nespola, A.; Forghieri, F.

doi:10.1109/jlt.2015.2447151

Cited by 54 publications

(31 citation statements)

References 34 publications

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“…The IGN model is suitable for physical layer impairment aware networking scenarios within some limitations-e.g., for low span loss. In Section 5.3, we prove the IGN to be sufficiently reliable for networking studies [24] in estimating the NLI efficiency among the available GN model versions [16,18,19,21].…”

Section: From the Physical Layer To The Graph Representationmentioning

confidence: 92%

“…The propagation impairments are directly linked to the physical structure of the network and set its performance through the available QoT of the single LPs [8][9][10][11][12][13][14][15][16][17]. Here, we will always assume networks operating according to the Locally-Optimized-Globally-Optimized (LOGO) strategy [18][19][20], meaning that each link works at its optimum transmitted power [16,21], which minimizes the NLI. Given a description of the network topology and transmission technologies, SNAP is capable of evaluating several metrics such as statistics of the average bit-rate per LP < R b,λ > for all possible LP demands arrangement, blocking probability (BP) vs. allocated traffic and average load of each link.…”

Section: Introductionmentioning

confidence: 99%

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Statistical Assessment of Open Optical Networks

et al. 2019

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In order to cope with the increase of the final user traffic, operators and vendors are pushing towards physical layer aware networking as a way to maximize the network capacity. To this aim, optical networks are becoming more and more open by exposing physical parameters enabling fast and reliable estimation of the lightpath quality of transmission. This comes in handy not only from the point of view of the planning and managing of the optical paths but also on a more general picture of the whole optical network performance. In this work, the Statistical Network Assessment Process (SNAP) is presented. SNAP is an algorithm allowing for estimating different network metrics such as blocking probability or link saturation, by generating traffic requests on a graph abstraction of the physical layer. Being aware of the physical layer parameters and transceiver technologies enables assessing their impact on high level network figures of merit. Together with a detailed description of the algorithm, we present a comprehensive review of several results on the networking impact of multirate transceivers, flex-grid spectral allocation as a means to finely exploit lightpath capacity and of different Space Division Multiplexing (SDM) solutions.

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Section: From the Physical Layer To The Graph Representationmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Statistical Assessment of Open Optical Networks

et al. 2019

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“…Both values refer to the worst-case scenario represented by the full spectral load, that in general is close to be realistic in any case thanks to the weak dependence of NLI generation on the spectral occupation [17]. For the optimal power, we considered a hard-limit of 20 dBm given by the maximum power that the amplifier may deliver on the entire C-band, but the LOGO value never induced to exceed such a limit.…”

Section: Transmission Layer Modelmentioning

confidence: 99%

Raman Pumping as an Energy Efficient Solution for NyWDM Flexible-grid Elastic Optical Networks

Ahmad¹,

Bianco²,

Curri³

et al. 2017

IJECE

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This paper investigates transparent wavelength routed optical networks using three different fiber types NZDSF, SMF and PSCF -and validates the effectiveness of Hybrid Raman/EDFA Fiber Amplification (HFA) with different pumping levels, up to the moderate 60% pumping regime. Nodes operate on the basis of flexible-grid elastic NyWDM transponders able to adapt the modulation format to the quality-of-transmission of the available lightpath, exploiting up to five 12.5 GHz spectral slots. Results consider a 37-node Pan-European network for variable Raman pumping level, span length and average traffic per node. We show that HFA in moderate pumping regime reduces the power consumption and enhances spectral efficiency for all three fiber types with particular evidence in NZDSF. In essence to that, introduction of HFA is also beneficial to avoid blocking for higher traffic loads.

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“…Such an assumption is reasonable and does not cause large overestimation in link QoT due to the weak dependence between η and the occupied bandwidth. Interested readers may refer to [8,[10][11][12] for further details.…”

Section: Physical Impairment Model and Routing Strategiesmentioning

confidence: 99%

“…The network can be completely unloaded at the beginning of the process-as it is in this work-or can carry some existing traffic. In our analysis, we consider networks operating according to the locally optimized globally optimized (LOGO) optimization strategy [9,10], meaning that each link runs at its optimal power [11,12]. Given the network topology graph, each fiber link is weighted by a quality of transmission (QoT) metric, the optical noise-to-signal ratio accumulation, computed by means of the incoherent Gaussian noise (GN) model [11].…”

Section: Introductionmentioning

confidence: 99%

Potentialities and Criticalities of Flexible-Rate Transponders in DWDM Networks: A Statistical Approach

Cantono

Gaudino

Curri

2016

J. Opt. Commun. Netw.

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We propose a novel method to assess physical layer potentialities of core optical networks aimed at finding solutions that better exploit the installed equipment. We focus on the use of flexible-rate transponders for the implementation of the elastic paradigm on the state-ofthe-art dense wavelength-division-multiplexed fixed-grid network scenarios. We make use of the waveplane-based routing and wavelength assignment algorithm presented in Dai et al. [J. Lightwave Technol., vol. 33, p. 3815, 2015] to implement a progressive statistical loading of the analyzed network topology, and perform a Monte Carlo analysis delivering a statistical characterization of the average bit rate per lightpath together with the assessment of network blocking. The proposed method allows for the identification of criticalities in terms of link congestion and lightpath quality of transmission, addressing solutions by identifying network bottlenecks. We apply the proposed method to a large pan-European network topology comparing two different transmission techniques for the implementations of flexible-rate transponders: pure PM-m-QAM versus hybrid modulation formats. Over this realistic network example, besides displaying the overall statistics for the average bit rate per lightpath, we show statistics for critical lightpaths and congested fiber links.Index Terms-Optical fiber communications; Optical fiber networks; Waveplane-based network performance analysis.A76 J. OPT. COMMUN. NETW./VOL. 8, NO. 7/JULY 2016 Cantono et al.1943-0620/16/070A76-10 Journal

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Design Strategies and Merit of System Parameters for Uniform Uncompensated Links Supporting Nyquist-WDM Transmission

Cited by 54 publications

References 34 publications

Statistical Assessment of Open Optical Networks

Statistical Assessment of Open Optical Networks

Raman Pumping as an Energy Efficient Solution for NyWDM Flexible-grid Elastic Optical Networks

Potentialities and Criticalities of Flexible-Rate Transponders in DWDM Networks: A Statistical Approach

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